Note 17 - Concentrations of Credit Risk (Details Textual)	6 Months Ended	12 Months Ended
Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Cash and Cash Equivalents, Including Long-term Cash Equivalents	$ 1,152,538	$ 1,005,624
Cash, Uninsured Amount	$ 955,173	$ 661,741
Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Number of Major Customers	3	1
Accounts Receivable, after Allowance for Credit Loss, Total		$ 1,430,646
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer One [Member]
Accounts Receivable, after Allowance for Credit Loss, Total	$ 477,535
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer Two [Member]
Accounts Receivable, after Allowance for Credit Loss, Total	135,308
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| Customer Three [Member]
Accounts Receivable, after Allowance for Credit Loss, Total	$ 134,847

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes long-term cash equivalents. Excludes cash and cash equivalents within disposal group and discontinued operation.

No definition available.

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- Definition

Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc.

+ References

No definition available.

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- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(5))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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- Definition

The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

+ References

No definition available.

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